Security Basics mailing list archives
Re: IP Spoofing/Masquarading
From: Sebastiaan <littlebighuman () gmail com>
Date: Wed, 9 Sep 2009 11:15:50 +0200
Well routing takes place based on the destination address, unless you specifically configure source routing, which isn't the case usually. So if you have packet is: source 192.168.1.1 destination 216.239.32.10 It will be send (usually) to your default gateway on your network destination Internet. Then usually the firewall will drop this, because most firewalls I know drop packets with a private source address. So spoofing with a private source address on the Internet isn't usually going to work. Unless it's in a tunnel or something. On 9/9/09, M.D.Mufambisi <mufambisi () gmail com> wrote:
Im not sure im being clear here. How does the packet get to the firewall in the first place when it has a source address of a machine within the firewall perimeter? internet--------------firewall(router)--------------lan from the internet....how does the packet get to the firewall when it has the lan ip addresses (ie private addresses)? Or am i failing to understand how this attack works? On 9/9/09, Sebastiaan <littlebighuman () gmail com> wrote:It usually doesn't. Most firewalls will drop this by default as will many routers. On 9/9/09, M.D.Mufambisi <mufambisi () gmail com> wrote:I understand that IP packets can be spoofed ie change the source address to make it look like they originated from the internal LAN. However, when this is done across the internet, with a private IP address in its source field, how does this packet get routed through the internet? Kind Regards ------------------------------------------------------------------------ This list is sponsored by: Information Assurance Certification Review Board Prove to peers and potential employers without a doubt that you can actually do a proper penetration test. IACRB CPT and CEPT certs require a full practical examination in order to become certified. http://www.iacertification.org ------------------------------------------------------------------------
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Current thread:
- IP Spoofing/Masquarading M.D.Mufambisi (Sep 11)
- Re: IP Spoofing/Masquarading Samuel Korpi (Sep 11)
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- Re: IP Spoofing/Masquarading M.D.Mufambisi (Sep 11)
- Re: IP Spoofing/Masquarading Sebastiaan (Sep 11)
- Re: IP Spoofing/Masquarading M.D.Mufambisi (Sep 11)
- Re: IP Spoofing/Masquarading Robert Portvliet (Sep 11)
- Re: IP Spoofing/Masquarading Marco Ivaldi (Sep 11)
- Re: IP Spoofing/Masquarading M.D.Mufambisi (Sep 11)
- Re: IP Spoofing/Masquarading Jack Carrozzo (Sep 11)
- RE: IP Spoofing/Masquarading David_Falloon (Sep 11)
- Message not available
- Re: IP Spoofing/Masquarading M.D.Mufambisi (Sep 11)
- Re: IP Spoofing/Masquarading Brad Edmondson (Sep 11)
- Re: IP Spoofing/Masquarading Fabien Vincent (Sep 11)
- Re: IP Spoofing/Masquarading M.D.Mufambisi (Sep 11)
- Re: IP Spoofing/Masquarading matteo filippetto (Sep 11)
- Re: IP Spoofing/Masquarading Gerardo Castillo Alvarado (Sep 11)